Sounds to me like the Hasselblad H3DII or H4D system would be a good choice. I am a digital tech trainer and do equipment consulting, specializing in MFD. Mostly Phase backs, but a couple of Blad backs and a Leaf 54s. Big screen, intuitive, fast control for viewing and reviewing, approval system on back, and with the 31mp or 39mp, or don't hesitate about 50mp, if you need the extreme crop or crazy size / bragging rights, the lenses are good for it, you will see a HUGE difference in the rendering, detail, etc. Personally, I find the Phase backs a PITA if you don't want to tether. Phase has many great things going for it, but back interface isn't one of them.
I have most of the MF camera systems, backs, and lenses here to train and test with, a part of our rentals and tech packages, and for your points, that is my vote. Also, gives you the fastest, easiest way to a natural look, and the digital lens profiles are very good, without ever looking overcooked. If you want to shoot Leaf, the best part of that workflow is instant wireless, zoomable to 100% reviews, by multiple parties, with any images any time, in current session, by iphone and ipod touch running OS3 or later. Great for stylists, makeup and hair, and of course AD's and clients. Check out a video we did about it on our capturetek site. If you ever come to Toronto, we can set up a studio session, where you can test and compare all the gear. We have a really nice rental studio here as well. Give me a call or email with any questions.
Best,
Mir Lada